Expansion joint for concrete roads



July 13 1926.

A. C. FISCHER EXPANSION JOINT FOR CONCRETE ROADS Filed April 23. 1923 arable, because of the layer formation,

Patented July 13, I926.

UNITED STATES PATENT o miner c or omonoo', more mansion 'Iom'rron corona-n some Application lied 4pm as, was. sum I. names.

This application is a continuation in giant I do not wish to be of iny application Serial No. 560,881, ed the use of flaked material, but if it is dean-- May 12, 1922. I also refer to my apphw able, unimpregnated cellular fibre may be tron Serial No. 84,605, filed January 29 introduced for the purpose'of ob re- 1928,jn which I am claimin the proceea oi expansion, for in'stan excelaior doulg be reform com 'tion used toadvantege, and ybei mixed with sheets, stripe, bloc so! the like to evelop the bituminous material and ii ed material rallel Stratification of the fillin dium 'would produce quite a resilient body. The

eheet form 'epperatus. urpose oi the incorporation of the cellular Heretofore i t hee beencusiomary in the bro is to secure eater inherent re-expan manufacture of expansion joints to use sibilityend Wok in whi'ohmatnirated .felte ditionalstrengthening means. The indewere the rincipal factors, use of the pendent wall would act as a'meana to prebinding va ues ofthe saturate felt. These jd joints were f rmed by first of saturated it together with on aephaltic adhesive, and later, due tothe'highcost of the felt instead of having the numerous layers of felt two thin layere of felt .were used as the outside binding element, and on aspheltic mastic mixed with fibrous material was between the two felt wall the felt walls acting as etifiening means an preventing the saggingof the asphalt.

In all of these formations deteriorating materiale were involved.

F RIC-E;

vent the sagging of the asphalt, and W0 and in the formation of a, rigid body.

Referring to Figure 1 (t3 represents bi tummoug materiel '(b) eme mica flakes to inch in size the flakes like formation with asphaltic material between the flakes.

However, itmust be readyvould be lying transversely but the meority of the flakes llow the directron of the feed of the asphalt through sheet forming rolls, and would adjust them eelyesJengthwise-with the joint The formation of this joint would be expans on and contraction of the slabs the 1t and o 'c matter contained in these expansion joints were soon pressed out or primed so thin that sand and it filtered in, causing the felt to decay an destroying between the fillree all ex ansive powers. The fibrous mam tuminoua V I do not wish to be limited in inco rarials involved in these mastic "formationa g were constituted of such vegetable subtion of other substances and .etidening ituminous means, should it be desirable.

noes as, cotton lintera, shredded wool fibre, which were impregnated with the-as- Referring to the drawing-Figure 2 ilphaltic materiel. lustrates an expansion joint consisting of My invention relates primal-i1 to the usebituminous material, (a micaceous flakes 0f -flaked mineral matter, sun as, mica (6), unpenetrated cellular fibre, flakes, shale flakes or slate flakes, or treated wit mogeneoue mass to secure vegetable matter, such as, treated archibility and rigidity. mente, papier'mh'eh, and other eti ening I claim: means in flaked formation which might be. secured or made into thin flakes from ,1, to inch in diameter. Mica would be prefcompnsnng a strip of asphaltic meter! tenacity of the flake. having ii tiller incorporated therein in and the feet that the asphaltic material to gr flakes, each of sa d nannot penetrate the mica, nor would the Oil segregated flakes evmg fiat arallel eurbe apt to affect it. thus destroying the stillface areas of relatively dimension, ening means, yet the stifl'ening means in itand providing separately acting etren onself would not be subject todecay. There is also a. resiliency in lhyer mice which might be utilized to advantage. Roast/ed peanut shells or flat, cellular fibrous matter is acceptable.

except that the sealing means i. I} preformed expansion joint for sepcrating subdivision of concrete pavingi ing parts. the flakes bemg distribute thru the aspaltic material in-mlbetantially pan allel strata and the majority of the flakes being separated one from another by a substantial thickness of the asphaltio material.

pilsofunction as an ad lying in slateily understood that many of these flakes consistsentirely of bi-' limited, however, o

the-

2. An expansion joint for separating the subdivisions of concrete pavement, comprisa plastic mixture of asphalt and fibrous material, said plastic mixture having a filler incorporated therein in the 'form of segregated .flakes, said flakes distri uted thru the plastic mixture-with the majority of the flakes separated one from another by a substantial thiclmess of said plastic mixture- 3. An expansion joint for separating the subdivisions of concrete paving, cozndpnsin a body of asphaltic material orme to fil the s ace between pav' members and having istributed throu h it a stifieningI material in the form 0 segregated fla es together with cellular materialin subdivided orm and having the inherent qualities of compressibility andresiliency.

4. An eirpansion joint for separating the subdivisions of concrete paving, comprisgllg a body of asphaltic material formed to the s between paving members and havi 'stribnted through it a; 'stifiening material in the form of segregated flakes together with shredded wood.

5. An expansion joint for separating the subdivision of concrete pavin comprlsin a body of asphaltic material ormed to the s ace between pavin members and having 'stributed through it a stifienin material in the form of segregated flaies t0- et-her with cellular material in subdivided orm and having the inherent ualities-oi compressibility and resiliency, t e cellular material being unimpregnated by the asphaltic material.

Signed at Chicago, Illinois this 10th day of November, A. D. 1922.

ALBERT C. FISCHER.

rial in the form of segregated fla es to-- ether with cellular material in subdivided orm and having the inherent qualities of compressibility and resiliency.

4. An expansion joint for separating the having subdivisions of concrete paving, comprisiirig a body of asphaltic material formed to the s ace between paving members and 'stributed through it a stiifening material in the form of segregated flakes together with shredded wood.

5. An expansion joint for separating the subdivision of concrete pavin comprisin a body of asphaltic material ormed to fil the s ace between pavin members and having istributed through it a stiffening material in the form of segregated flakes toether with cellular material in subdivided orm and having the inherent ualitiesof comprexibility and resiliency, t e cellular material being unimpregnated by the asphaltic material.

Signed at Chicago, Illinois this 10th day of November, A. D. 1922.

ALBERT C. FISCHER.

CERTIFICATE OF CORRECTION.

Patent No. 1,591,968.

Granted July 13, 1926, to

ALBERT c. riscnsa.

It is hereby certified thaterro'r a l ppears III the printed specification of the above n umbered patent requiring correction as follows: Page 1, line 36, for the words shredded wool" read "shredded wood"; and that the said Letters Patent should be read w i th Seal.

this correction therein that the same ma l .eonf record of the case in the Patent Office. arm to the Signed and sealed this 13th day of March, A; D.

M. J. Moore, 7 Acting Commissioner-oi Patents.

CERTIFICATE OF CORRECTION.

Patent No. 1,591,968. Granted July 13. 1926, to

ALBERT C. FISCHER.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring'correction as follows: Page 1, line 36, for the words "shredded wool" read "shredded wood"; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 13th dayof March, A. D. 1928.

M. J. Moore,

Seal. Acting Commissioner of Patents. 

